Compare two PDF using PHP

Highly accurate PHP diff checker to compare PDF files and find differences between them

Our powerful PHP SDK allows you to find the difference between PDF documents and save the results to a convenient format for viewing. To verify our product capabilities, compare PDF files using this PHP library and see the differences.

Compare PDF in PHP

Our PHP SDK is designed to give you the most accurate result, even though comparison is a complex function itself.

Sometimes you need to be sure that the document in the PDF format has not been changed, and if it has, you need to find out what the difference is. Just use our PHP diff tool to compare two PDF files and find differences in whole words or single characters. Moreover, if only one character in a word has changed, this word will be marked as changed entirely.

Now you no longer need to spend time manually comparing PDF documents, and you can quickly find even small changes and export such diffs to a document in a convenient format.

Try to compare PDF documents

Check out how our solution to compare PDF files using PHP SDK works. To achieve this, load the PDF files you want to compare and select the export file format – it will be automatically loaded after comparing.

Note that you need to accept all revisions in compared documents before calling the comparison method, as shown in our example:

Compare PDF files using PHP and find the difference

Input files

Upload the compared file

Run code

Upload the second file to compare

Output format

Select the target format from the list

use Aspose\Words\WordsApi;

$wordsApi = new WordsApi('####-####-####-####-####', '##################');
$fileName1 = "Input1.pdf";
$fileName2 = "Input2.pdf";
$fileResult = "Output.pdf";

/**
 *  Upload documents to cloud storage.
 */
$firstDocumentContent = $fileName1;
$uploadFirstFileRequest = new UploadFileRequest(
    $firstDocumentContent, $fileName1, NULL
);
$wordsApi->uploadFile($uploadFirstFileRequest);

$secondDocumentContent = $fileName2;
$uploadSecondFileRequest = new UploadFileRequest(
    $secondDocumentContent, $fileName2, NULL
);
$wordsApi->uploadFile($uploadSecondFileRequest);

/**
 *  Compare documents in cloud.
 */
$compareDataOptions = new CompareData(array(
    "author" => "author",
    "file_reference" => FileReference::fromRemoteFilePath($fileName2)
));
$compareDocumentRequest = new CompareDocumentRequest(
    $fileName1, $compareDataOptions, NULL, NULL, NULL, NULL, NULL, $fileResult, NULL
);
$wordsApi->compareDocument($compareDocumentRequest);

/**
 *  Download result document from cloud storage.
 */
$downloadFileRequest = new DownloadFileRequest(
    $fileResult, NULL, NULL
);
$downloadFileResult = $wordsApi->downloadFile($downloadFileRequest);
rename(reset($downloadFileResult)->getPathname(), 'compareResult.pdf');

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How to Compare two text files

Install Aspose.Words Cloud for PHP
Add a library reference (import the library) to your PHP project
Load two PDF documents to compare
Call the compareDocument() method to compare PDF docs
Download the result document from the cloud storage

PHP library to use compare

Install 'Aspose.Words Cloud SDK for PHP' from Packagist repository. Just run composer require aspose-cloud/aspose-words-cloud to install the SDK, then use require_once('vendor/autoload.php'); to import it into your project.

As an alternative, you can manually clone Aspose.Words Cloud SDK for PHP source code from GitHub. Please follow these Instructions to quickly get the necessary security credentials and access our REST API.